Class NullableAttribute

Explicitly specifies that associated column could contain NULL values. Overrides default nullability flag from current mapping schema for property/field type. Has lower priority over CanBeNull. Using this attribute, you can allow NULL values for identity columns.

Inheritance
System.Object
MappingAttribute
NullableAttribute
NotNullAttribute
Namespace: LinqToDB.Mapping
Assembly: linq2db.dll
Syntax
public class NullableAttribute : MappingAttribute

Constructors

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NullableAttribute()

Creates attribute isntance.

Declaration
public NullableAttribute()
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NullableAttribute(Boolean)

Creates attribute isntance.

Declaration
public NullableAttribute(bool isNullable)
Parameters
Type Name Description
System.Boolean isNullable

Nullability flag for current column.
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NullableAttribute(String, Boolean)

Creates attribute isntance.

Declaration
public NullableAttribute(string configuration, bool isNullable)
Parameters
Type Name Description
System.String configuration

Mapping schema configuration name. See Configuration.
System.Boolean isNullable

Nullability flag for current column.

Properties

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CanBeNull

Gets or sets nullability flag for current column. Default value: true.

Declaration
public bool CanBeNull { get; set; }
Property Value
Type Description
System.Boolean
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Configuration

Gets or sets mapping schema configuration name, for which this attribute should be taken into account. ProviderName for standard names. Attributes with null or empty string Configuration value applied to all configurations (if no attribute found for current configuration).

Declaration
public string? Configuration { get; set; }
Property Value
Type Description
System.Nullable<System.String>

Methods

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GetObjectID()

Declaration
public override string GetObjectID()
Returns
Type Description
System.String
Overrides

Extension Methods